P0122 Cadillac Code - Throttle Position Sensor 1 Circuit Low Voltage
Quick Answer
The P0122 diagnostic trouble code (DTC) for Cadillac vehicles indicates a problem with the Throttle Position Sensor (TPS) circuit having lower than expected voltage. Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connection at the TPS terminals. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0122 Cadillac indicates Throttle Position Sensor 1 Circuit Low Voltage.
- Common causes
- Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or poor connection at the TPS terminals.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0122 Cadillac Description
The P0122 diagnostic trouble code (DTC) for Cadillac vehicles indicates a problem with the Throttle Position Sensor (TPS) circuit having lower than expected voltage. The TPS is a crucial component of the engine management system, as it monitors the position of the throttle valve and sends this information to the engine control unit (ECU). The ECU then uses this data to adjust fuel delivery and ignition timing for optimal engine performance.
Common Causes of P0122 Cadillac
- Faulty Throttle Position Sensor
- Damaged wiring or connectors in the TPS circuit
- Corrosion or poor connection at the TPS terminals
- ECU malfunction affecting TPS voltage readings
- Environmental factors such as moisture or debris affecting TPS operation
Symptoms of P0122 Cadillac
- Hesitation or stumbling during acceleration
- Rough idling or stalling
- Reduced fuel efficiency
- Check Engine Light illuminated
- Engine going into limp mode
How to Fix P0122 Cadillac
- Begin by scanning the vehicle's ECU for trouble codes and confirming the presence of P0122.
- Inspect the Throttle Position Sensor, wiring, and connectors for any visible damage or corrosion.
- Test the TPS using a multimeter to check for proper voltage readings and signal consistency.
- If the TPS is faulty, replace it with a new sensor following manufacturer guidelines.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P0122 Cadillac
The cost of repairing a Throttle Position Sensor circuit low voltage issue can vary depending on the specific vehicle make and model, as well as the location and labor rates of the repair shop. Typically, replacing a Throttle Position Sensor can cost between $100 to $300, including parts and labor. However, additional diagnostic time and potential wiring repairs may increase the overall cost. It's recommended to consult with a professional mechanic for a more accurate cost estimate tailored to your vehicle's needs.
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Frequently Asked Questions about P0122 Cadillac Code
What does the OBDII code P0122 mean on a Cadillac?
P0122 indicates that the Throttle Position Sensor (TPS) 1 circuit is reporting a voltage lower than the expected range, often below 0.2 volts.
What are the common symptoms of code P0122 in a Cadillac?
Symptoms include poor acceleration, rough idling, engine stalling, hesitation during acceleration, and the illumination of the check engine light.
What causes the P0122 code in a Cadillac?
Common causes include a faulty throttle position sensor, damaged or corroded wiring, a loose or disconnected TPS connector, or a problem with the engine control module (ECM).
Can a dirty throttle body trigger the P0122 code?
Yes, a dirty throttle body can interfere with the TPS sensor’s readings and potentially cause the P0122 code.
How do you diagnose the P0122 code on a Cadillac?
Diagnosis involves checking the TPS voltage with a multimeter, inspecting the wiring and connectors, cleaning the throttle body, and using a scan tool to monitor sensor data.
Can you drive a Cadillac with the P0122 code?
Driving with the P0122 code is not recommended, as it can lead to poor engine performance, stalling, and unsafe driving conditions.
How do you fix the P0122 code on a Cadillac?
Repairs may include replacing the TPS sensor, cleaning the throttle body, repairing damaged wiring or connectors, or reprogramming the ECM if necessary.
How much does it cost to repair a P0122 code on a Cadillac?
The cost varies but generally ranges from $100 to $300, depending on whether the TPS sensor, wiring, or other components need replacement.
Can a bad TPS sensor cause other codes besides P0122?
Yes, a faulty TPS sensor can trigger related codes, such as P0121, P0123, or codes affecting fuel and air mixture control.
How can you prevent the P0122 code from reoccurring?
Regular maintenance, including cleaning the throttle body and inspecting the wiring and connectors, can help prevent the P0122 code from reappearing.
Discuss the causes and fixes for P0122 Cadillac OBDII Code
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The service engine soon lights come on - on my 2004 Cadillac DeVille. After diagnostic testing it shows that the P0122 thottle pedal position sensor is the problem. Here are the symptoms: When I have to stop at a red light or a stop sign, the car completely shuts off. I noticed that if I keep my foot on the brake and the gas peddal at the same time, the car does not shut down. My conclusion is that If I take my foot off the gas, the car won't idle, however, on the contrary, when I got home and parked the car for a day or so, the car was idling perfectrly and this problem of breaking down without notice did not re-occur? Could this TPS be the only reason the car just went dead?
Please let me know.
Cassandra Lakes
Canada
[email protected] -
There is a service bulletin for this problem and the factory recommends the following:
- Disconnect /reconnect the negative battery cable and then see if the car will start.
- If the engine does not start, remove the PCM connectors and reinstall them to the PCM. Make sure the connector is fully seated before the locking slide is engaged. It is possible to have the PCM connector slide in the lock position with out having the connector completely seated into the PCM.
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